1DBCOLCOPYLAST(1) User Contributed Perl Documentation DBCOLCOPYLAST(1)
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6 dbcolcopylast - create new columns that are copies of prior columns
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9 dbcolcopylast [-e EMPTY] [column...]
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12 For each COLUMN, create a new column copylast_COLUMN that is the last
13 value for that column---that is, the value of that column from the row
14 before.
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17 -e EmptyValue or --empty
18 Specify the value newly created columns get.
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20 This module also supports the standard fsdb options:
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22 -d Enable debugging output.
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24 -i or --input InputSource
25 Read from InputSource, typically a file name, or "-" for standard
26 input, or (if in Perl) a IO::Handle, Fsdb::IO or Fsdb::BoundedQueue
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29 -o or --output OutputDestination
30 Write to OutputDestination, typically a file name, or "-" for
31 standard output, or (if in Perl) a IO::Handle, Fsdb::IO or
32 Fsdb::BoundedQueue objects.
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34 --autorun or --noautorun
35 By default, programs process automatically, but Fsdb::Filter
36 objects in Perl do not run until you invoke the run() method. The
37 "--(no)autorun" option controls that behavior within Perl.
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39 --help
40 Show help.
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42 --man
43 Show full manual.
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46 Input:
47 #fsdb test
48 a
49 b
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51 Command:
52 cat data.fsdb | dbcolcopylast foo
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54 Output:
55 #fsdb test foo
56 a -
57 b -
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60 Fsdb.
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63 Copyright (C) 1991-2018 by John Heidemann <johnh@isi.edu>
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65 This program is distributed under terms of the GNU general public
66 license, version 2. See the file COPYING with the distribution for
67 details.
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71perl v5.30.0 2019-09-19 DBCOLCOPYLAST(1)